I have a '77 F-250 with a C6 and it wont shift out of 1st gear. I bought the truck after it sat for about a year and I have been doing work to it here and there and I took it for a ride up my street and it wouldnt come out of 1st. Anyone have any ideas where I should start looking for my problem? the tranny is full of fluid so I know I am good there. Please if anyone can help let me know.
Wont shift HELP!!!
Started by
77 HighBoy
, Mar 03 2009 05:25 PM
1 reply to this topic
#2
Redneck390
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Duck Tape L'fixer :)
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Posted 03 March 2009 - 06:48 PM
I bet its your modulator on the transmission, theres a vacuum line goin to it. Check that, make sure it aint leakin...itll be kind obvious should be the only vacuum line goin back there outta be on the same side as the dip stick. If it is in fact leakin replace the line and itll shift again. If not then you probably need a new modulator.
1975 Ford F250 High Boy
390FE Big Block, 4-Speed, NP205
Dana 60 FF Rear
Dana 44 Closed Knuckle Front
390FE Big Block, 4-Speed, NP205
Dana 60 FF Rear
Dana 44 Closed Knuckle Front
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